In this update, in an explosive series of tweets, US president Donald Trump has accused his predecessor of illegally spying on him; China's leaders have forecast a slight slowdown in economic growth to six and a half per cent this year; back home, the Victorian Government is giving first home buyers a boost by abolishing stamp duty on properties under six-hundred-thousand-dollars; and Australia’s new 100-million dollar joint strike fighter aircraft have been temporarily grounded because they can't fly in bad weather.